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Diffstat (limited to '')
| -rw-r--r-- | src/modules/module-virtual-source.c | 755 |
1 files changed, 755 insertions, 0 deletions
diff --git a/src/modules/module-virtual-source.c b/src/modules/module-virtual-source.c new file mode 100644 index 0000000..22566b0 --- /dev/null +++ b/src/modules/module-virtual-source.c @@ -0,0 +1,755 @@ +/*** + This file is part of PulseAudio. + + Copyright 2010 Intel Corporation + Contributor: Pierre-Louis Bossart <pierre-louis.bossart@intel.com> + + PulseAudio is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2.1 of the License, + or (at your option) any later version. + + PulseAudio is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with PulseAudio; if not, see <http://www.gnu.org/licenses/>. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> + +#include <pulse/xmalloc.h> + +#include <pulsecore/i18n.h> +#include <pulsecore/macro.h> +#include <pulsecore/namereg.h> +#include <pulsecore/sink.h> +#include <pulsecore/module.h> +#include <pulsecore/core-util.h> +#include <pulsecore/modargs.h> +#include <pulsecore/log.h> +#include <pulsecore/rtpoll.h> +#include <pulsecore/sample-util.h> +#include <pulsecore/ltdl-helper.h> +#include <pulsecore/mix.h> +#include <pulsecore/rtpoll.h> + +PA_MODULE_AUTHOR("Pierre-Louis Bossart"); +PA_MODULE_DESCRIPTION("Virtual source"); +PA_MODULE_VERSION(PACKAGE_VERSION); +PA_MODULE_LOAD_ONCE(false); +PA_MODULE_USAGE( + _("source_name=<name for the source> " + "source_properties=<properties for the source> " + "master=<name of source to filter> " + "uplink_sink=<name> (optional)" + "format=<sample format> " + "rate=<sample rate> " + "channels=<number of channels> " + "channel_map=<channel map> " + "use_volume_sharing=<yes or no> " + "force_flat_volume=<yes or no> " + )); + +#define MEMBLOCKQ_MAXLENGTH (16*1024*1024) +#define BLOCK_USEC 1000 /* FIXME */ + +struct userdata { + pa_module *module; + + /* FIXME: Uncomment this and take "autoloaded" as a modarg if this is a filter */ + /* bool autoloaded; */ + + pa_source *source; + pa_source_output *source_output; + + pa_memblockq *memblockq; + + bool auto_desc; + unsigned channels; + + /* optional fields for uplink sink */ + pa_sink *sink; + pa_usec_t block_usec; + pa_memblockq *sink_memblockq; + pa_rtpoll *rtpoll; + +}; + +static const char* const valid_modargs[] = { + "source_name", + "source_properties", + "master", + "uplink_sink", + "format", + "rate", + "channels", + "channel_map", + "use_volume_sharing", + "force_flat_volume", + NULL +}; + +/* Called from I/O thread context */ +static int sink_process_msg_cb(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) { + + switch (code) { + + case PA_SINK_MESSAGE_GET_LATENCY: + + /* there's no real latency here */ + *((int64_t*) data) = 0; + + return 0; + } + + return pa_sink_process_msg(o, code, data, offset, chunk); +} + +/* Called from main context */ +static int sink_set_state_in_main_thread_cb(pa_sink *s, pa_sink_state_t state, pa_suspend_cause_t suspend_cause) { + struct userdata *u; + + pa_sink_assert_ref(s); + pa_assert_se(u = s->userdata); + + if (!PA_SINK_IS_LINKED(state)) { + return 0; + } + + if (state == PA_SINK_RUNNING) { + /* need to wake-up source if it was suspended */ + pa_log_debug("Resuming source %s, because its uplink sink became active.", u->source->name); + pa_source_suspend(u->source, false, PA_SUSPEND_ALL); + + /* FIXME: if there's no client connected, the source will suspend + and playback will be stuck. You'd want to prevent the source from + sleeping when the uplink sink is active; even if the audio is + discarded at least the app isn't stuck */ + + } else { + /* nothing to do, if the sink becomes idle or suspended let + module-suspend-idle handle the sources later */ + } + + return 0; +} + +static void sink_update_requested_latency_cb(pa_sink *s) { + struct userdata *u; + + pa_sink_assert_ref(s); + pa_assert_se(u = s->userdata); + + /* FIXME: there's no latency support */ + +} + +/* Called from I/O thread context */ +static int source_process_msg_cb(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) { + struct userdata *u = PA_SOURCE(o)->userdata; + + switch (code) { + + case PA_SOURCE_MESSAGE_GET_LATENCY: + + /* The source is _put() before the source output is, so let's + * make sure we don't access it in that time. Also, the + * source output is first shut down, the source second. */ + if (!PA_SOURCE_IS_LINKED(u->source->thread_info.state) || + !PA_SOURCE_OUTPUT_IS_LINKED(u->source_output->thread_info.state)) { + *((pa_usec_t*) data) = 0; + return 0; + } + + *((pa_usec_t*) data) = + + /* Get the latency of the master source */ + pa_source_get_latency_within_thread(u->source_output->source, true) + + + /* Add the latency internal to our source output on top */ + /* FIXME, no idea what I am doing here */ + pa_bytes_to_usec(pa_memblockq_get_length(u->source_output->thread_info.delay_memblockq), &u->source_output->source->sample_spec); + + return 0; + } + + return pa_source_process_msg(o, code, data, offset, chunk); +} + +/* Called from main context */ +static int source_set_state_in_main_thread_cb(pa_source *s, pa_source_state_t state, pa_suspend_cause_t suspend_cause) { + struct userdata *u; + + pa_source_assert_ref(s); + pa_assert_se(u = s->userdata); + + if (!PA_SOURCE_IS_LINKED(state) || + !PA_SOURCE_OUTPUT_IS_LINKED(u->source_output->state)) + return 0; + + pa_source_output_cork(u->source_output, state == PA_SOURCE_SUSPENDED); + return 0; +} + +/* Called from I/O thread context */ +static void source_update_requested_latency_cb(pa_source *s) { + struct userdata *u; + + pa_source_assert_ref(s); + pa_assert_se(u = s->userdata); + + if (!PA_SOURCE_IS_LINKED(u->source->thread_info.state) || + !PA_SOURCE_OUTPUT_IS_LINKED(u->source_output->thread_info.state)) + return; + + /* Just hand this one over to the master source */ + pa_source_output_set_requested_latency_within_thread( + u->source_output, + pa_source_get_requested_latency_within_thread(s)); +} + +/* Called from main context */ +static void source_set_volume_cb(pa_source *s) { + struct userdata *u; + + pa_source_assert_ref(s); + pa_assert_se(u = s->userdata); + + if (!PA_SOURCE_IS_LINKED(s->state) || + !PA_SOURCE_OUTPUT_IS_LINKED(u->source_output->state)) + return; + + pa_source_output_set_volume(u->source_output, &s->real_volume, s->save_volume, true); +} + +/* Called from main context */ +static void source_set_mute_cb(pa_source *s) { + struct userdata *u; + + pa_source_assert_ref(s); + pa_assert_se(u = s->userdata); + + if (!PA_SOURCE_IS_LINKED(s->state) || + !PA_SOURCE_OUTPUT_IS_LINKED(u->source_output->state)) + return; + + pa_source_output_set_mute(u->source_output, s->muted, s->save_muted); +} + +/* Called from input thread context */ +static void source_output_push_cb(pa_source_output *o, const pa_memchunk *chunk) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_source_output_assert_io_context(o); + pa_assert_se(u = o->userdata); + + if (!PA_SOURCE_IS_LINKED(u->source->thread_info.state)) + return; + + if (!PA_SOURCE_OUTPUT_IS_LINKED(u->source_output->thread_info.state)) { + pa_log("push when no link?"); + return; + } + + /* PUT YOUR CODE HERE TO DO SOMETHING WITH THE SOURCE DATA */ + + /* if uplink sink exists, pull data from there; simplify by using + same length as chunk provided by source */ + if (u->sink && (u->sink->thread_info.state == PA_SINK_RUNNING)) { + pa_memchunk tchunk; + size_t nbytes = chunk->length; + pa_mix_info streams[2]; + pa_memchunk target_chunk; + void *target; + int ch; + + /* Hmm, process any rewind request that might be queued up */ + pa_sink_process_rewind(u->sink, 0); + + /* get data from the sink */ + while (pa_memblockq_peek(u->sink_memblockq, &tchunk) < 0) { + pa_memchunk nchunk; + + /* make sure we get nbytes from the sink with render_full, + otherwise we cannot mix with the uplink */ + pa_sink_render_full(u->sink, nbytes, &nchunk); + pa_memblockq_push(u->sink_memblockq, &nchunk); + pa_memblock_unref(nchunk.memblock); + } + pa_assert(tchunk.length == chunk->length); + + /* move the read pointer for sink memblockq */ + pa_memblockq_drop(u->sink_memblockq, tchunk.length); + + /* allocate target chunk */ + /* this could probably be done in-place, but having chunk as both + the input and output creates issues with reference counts */ + target_chunk.index = 0; + target_chunk.length = chunk->length; + pa_assert(target_chunk.length == chunk->length); + + target_chunk.memblock = pa_memblock_new(o->source->core->mempool, + target_chunk.length); + pa_assert( target_chunk.memblock ); + + /* get target pointer */ + target = pa_memblock_acquire_chunk(&target_chunk); + + /* set-up mixing structure + volume was taken care of in sink and source already */ + streams[0].chunk = *chunk; + for(ch=0;ch<o->sample_spec.channels;ch++) + streams[0].volume.values[ch] = PA_VOLUME_NORM; /* FIXME */ + streams[0].volume.channels = o->sample_spec.channels; + + streams[1].chunk = tchunk; + for(ch=0;ch<o->sample_spec.channels;ch++) + streams[1].volume.values[ch] = PA_VOLUME_NORM; /* FIXME */ + streams[1].volume.channels = o->sample_spec.channels; + + /* do mixing */ + pa_mix(streams, /* 2 streams to be mixed */ + 2, + target, /* put result in target chunk */ + chunk->length, /* same length as input */ + (const pa_sample_spec *)&o->sample_spec, /* same sample spec for input and output */ + NULL, /* no volume information */ + false); /* no mute */ + + pa_memblock_release(target_chunk.memblock); + pa_memblock_unref(tchunk.memblock); /* clean-up */ + + /* forward the data to the virtual source */ + pa_source_post(u->source, &target_chunk); + + pa_memblock_unref(target_chunk.memblock); /* clean-up */ + + } else { + /* forward the data to the virtual source */ + pa_source_post(u->source, chunk); + } + +} + +/* Called from input thread context */ +static void source_output_process_rewind_cb(pa_source_output *o, size_t nbytes) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_source_output_assert_io_context(o); + pa_assert_se(u = o->userdata); + + /* If the source is not yet linked, there is nothing to rewind */ + if (PA_SOURCE_IS_LINKED(u->source->thread_info.state)) + pa_source_process_rewind(u->source, nbytes); + + /* FIXME, no idea what I am doing here */ +#if 0 + pa_asyncmsgq_post(u->asyncmsgq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_REWIND, NULL, (int64_t) nbytes, NULL, NULL); + u->send_counter -= (int64_t) nbytes; +#endif +} + +/* Called from output thread context */ +static void source_output_update_max_rewind_cb(pa_source_output *o, size_t nbytes) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_source_output_assert_io_context(o); + pa_assert_se(u = o->userdata); + + pa_source_set_max_rewind_within_thread(u->source, nbytes); +} + +/* Called from output thread context */ +static void source_output_attach_cb(pa_source_output *o) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_source_output_assert_io_context(o); + pa_assert_se(u = o->userdata); + + pa_source_set_rtpoll(u->source, o->source->thread_info.rtpoll); + pa_source_set_latency_range_within_thread(u->source, o->source->thread_info.min_latency, o->source->thread_info.max_latency); + pa_source_set_fixed_latency_within_thread(u->source, o->source->thread_info.fixed_latency); + pa_source_set_max_rewind_within_thread(u->source, pa_source_output_get_max_rewind(o)); + + if (PA_SOURCE_IS_LINKED(u->source->thread_info.state)) + pa_source_attach_within_thread(u->source); +} + +/* Called from output thread context */ +static void source_output_detach_cb(pa_source_output *o) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_source_output_assert_io_context(o); + pa_assert_se(u = o->userdata); + + if (PA_SOURCE_IS_LINKED(u->source->thread_info.state)) + pa_source_detach_within_thread(u->source); + pa_source_set_rtpoll(u->source, NULL); +} + +/* Called from output thread context except when cork() is called without valid source.*/ +static void source_output_state_change_cb(pa_source_output *o, pa_source_output_state_t state) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_assert_se(u = o->userdata); + + /* FIXME */ +#if 0 + if (PA_SOURCE_OUTPUT_IS_LINKED(state) && o->thread_info.state == PA_SOURCE_OUTPUT_INIT && o->source) { + + u->skip = pa_usec_to_bytes(PA_CLIP_SUB(pa_source_get_latency_within_thread(o->source, false), + u->latency), + &o->sample_spec); + + pa_log_info("Skipping %lu bytes", (unsigned long) u->skip); + } +#endif +} + +/* Called from main thread */ +static void source_output_kill_cb(pa_source_output *o) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_assert_ctl_context(); + pa_assert_se(u = o->userdata); + + /* The order here matters! We first kill the source so that streams + * can properly be moved away while the source output is still connected + * to the master. */ + pa_source_output_cork(u->source_output, true); + pa_source_unlink(u->source); + pa_source_output_unlink(u->source_output); + + pa_source_output_unref(u->source_output); + u->source_output = NULL; + + pa_source_unref(u->source); + u->source = NULL; + + pa_module_unload_request(u->module, true); +} + +/* Called from main thread */ +static void source_output_moving_cb(pa_source_output *o, pa_source *dest) { + struct userdata *u; + uint32_t idx; + pa_source_output *output; + + pa_source_output_assert_ref(o); + pa_assert_ctl_context(); + pa_assert_se(u = o->userdata); + + if (dest) { + pa_source_set_asyncmsgq(u->source, dest->asyncmsgq); + pa_source_update_flags(u->source, PA_SOURCE_LATENCY|PA_SOURCE_DYNAMIC_LATENCY, dest->flags); + } else + pa_source_set_asyncmsgq(u->source, NULL); + + /* Propagate asyncmsq change to attached virtual sources */ + PA_IDXSET_FOREACH(output, u->source->outputs, idx) { + if (output->destination_source && output->moving) + output->moving(output, u->source); + } + + if (u->auto_desc && dest) { + const char *z; + pa_proplist *pl; + + pl = pa_proplist_new(); + z = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION); + pa_proplist_setf(pl, PA_PROP_DEVICE_DESCRIPTION, "Virtual Source %s on %s", + pa_proplist_gets(u->source->proplist, "device.vsource.name"), z ? z : dest->name); + + pa_source_update_proplist(u->source, PA_UPDATE_REPLACE, pl); + pa_proplist_free(pl); + } +} + +int pa__init(pa_module*m) { + struct userdata *u; + pa_sample_spec ss; + pa_channel_map map; + pa_modargs *ma; + pa_source *master=NULL; + pa_source_output_new_data source_output_data; + pa_source_new_data source_data; + bool use_volume_sharing = true; + bool force_flat_volume = false; + + /* optional for uplink_sink */ + pa_sink_new_data sink_data; + size_t nbytes; + + pa_assert(m); + + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { + pa_log("Failed to parse module arguments."); + goto fail; + } + + if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SOURCE))) { + pa_log("Master source not found"); + goto fail; + } + + pa_assert(master); + + ss = master->sample_spec; + ss.format = PA_SAMPLE_FLOAT32; + map = master->channel_map; + if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) { + pa_log("Invalid sample format specification or channel map"); + goto fail; + } + + if (pa_modargs_get_value_boolean(ma, "use_volume_sharing", &use_volume_sharing) < 0) { + pa_log("use_volume_sharing= expects a boolean argument"); + goto fail; + } + + if (pa_modargs_get_value_boolean(ma, "force_flat_volume", &force_flat_volume) < 0) { + pa_log("force_flat_volume= expects a boolean argument"); + goto fail; + } + + if (use_volume_sharing && force_flat_volume) { + pa_log("Flat volume can't be forced when using volume sharing."); + goto fail; + } + + u = pa_xnew0(struct userdata, 1); + u->module = m; + m->userdata = u; + u->memblockq = pa_memblockq_new("module-virtual-source memblockq", 0, MEMBLOCKQ_MAXLENGTH, 0, &ss, 1, 1, 0, NULL); + if (!u->memblockq) { + pa_log("Failed to create source memblockq."); + goto fail; + } + u->channels = ss.channels; + + /* The rtpoll created here is never run. It is only necessary to avoid crashes + * when module-virtual-source is used together with module-loopback or + * module-combine-sink. Both modules base their asyncmsq on the rtpoll provided + * by the sink. module-loopback and combine-sink only work because they + * call pa_asyncmsq_process_one() themselves. */ + u->rtpoll = pa_rtpoll_new(); + + /* Create source */ + pa_source_new_data_init(&source_data); + source_data.driver = __FILE__; + source_data.module = m; + if (!(source_data.name = pa_xstrdup(pa_modargs_get_value(ma, "source_name", NULL)))) + source_data.name = pa_sprintf_malloc("%s.vsource", master->name); + pa_source_new_data_set_sample_spec(&source_data, &ss); + pa_source_new_data_set_channel_map(&source_data, &map); + pa_proplist_sets(source_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name); + pa_proplist_sets(source_data.proplist, PA_PROP_DEVICE_CLASS, "filter"); + pa_proplist_sets(source_data.proplist, "device.vsource.name", source_data.name); + + if (pa_modargs_get_proplist(ma, "source_properties", source_data.proplist, PA_UPDATE_REPLACE) < 0) { + pa_log("Invalid properties"); + pa_source_new_data_done(&source_data); + goto fail; + } + + if ((u->auto_desc = !pa_proplist_contains(source_data.proplist, PA_PROP_DEVICE_DESCRIPTION))) { + const char *z; + + z = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION); + pa_proplist_setf(source_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Virtual Source %s on %s", source_data.name, z ? z : master->name); + } + + u->source = pa_source_new(m->core, &source_data, (master->flags & (PA_SOURCE_LATENCY|PA_SOURCE_DYNAMIC_LATENCY)) + | (use_volume_sharing ? PA_SOURCE_SHARE_VOLUME_WITH_MASTER : 0)); + + pa_source_new_data_done(&source_data); + + if (!u->source) { + pa_log("Failed to create source."); + goto fail; + } + + u->source->parent.process_msg = source_process_msg_cb; + u->source->set_state_in_main_thread = source_set_state_in_main_thread_cb; + u->source->update_requested_latency = source_update_requested_latency_cb; + pa_source_set_set_mute_callback(u->source, source_set_mute_cb); + if (!use_volume_sharing) { + pa_source_set_set_volume_callback(u->source, source_set_volume_cb); + pa_source_enable_decibel_volume(u->source, true); + } + /* Normally this flag would be enabled automatically be we can force it. */ + if (force_flat_volume) + u->source->flags |= PA_SOURCE_FLAT_VOLUME; + u->source->userdata = u; + + pa_source_set_asyncmsgq(u->source, master->asyncmsgq); + + /* Create source output */ + pa_source_output_new_data_init(&source_output_data); + source_output_data.driver = __FILE__; + source_output_data.module = m; + pa_source_output_new_data_set_source(&source_output_data, master, false, true); + source_output_data.destination_source = u->source; + + pa_proplist_setf(source_output_data.proplist, PA_PROP_MEDIA_NAME, "Virtual Source Stream of %s", pa_proplist_gets(u->source->proplist, PA_PROP_DEVICE_DESCRIPTION)); + pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_ROLE, "filter"); + pa_source_output_new_data_set_sample_spec(&source_output_data, &ss); + pa_source_output_new_data_set_channel_map(&source_output_data, &map); + source_output_data.flags |= PA_SOURCE_OUTPUT_START_CORKED; + + pa_source_output_new(&u->source_output, m->core, &source_output_data); + pa_source_output_new_data_done(&source_output_data); + + if (!u->source_output) + goto fail; + + u->source_output->push = source_output_push_cb; + u->source_output->process_rewind = source_output_process_rewind_cb; + u->source_output->update_max_rewind = source_output_update_max_rewind_cb; + u->source_output->kill = source_output_kill_cb; + u->source_output->attach = source_output_attach_cb; + u->source_output->detach = source_output_detach_cb; + u->source_output->state_change = source_output_state_change_cb; + u->source_output->moving = source_output_moving_cb; + u->source_output->userdata = u; + + u->source->output_from_master = u->source_output; + + /* The order here is important. The output must be put first, + * otherwise streams might attach to the source before the + * source output is attached to the master. */ + pa_source_output_put(u->source_output); + pa_source_put(u->source); + pa_source_output_cork(u->source_output, false); + + /* Create optional uplink sink */ + pa_sink_new_data_init(&sink_data); + sink_data.driver = __FILE__; + sink_data.module = m; + if ((sink_data.name = pa_xstrdup(pa_modargs_get_value(ma, "uplink_sink", NULL)))) { + pa_sink_new_data_set_sample_spec(&sink_data, &ss); + pa_sink_new_data_set_channel_map(&sink_data, &map); + pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name); + pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_CLASS, "uplink sink"); + pa_proplist_sets(sink_data.proplist, "device.uplink_sink.name", sink_data.name); + + if ((u->auto_desc = !pa_proplist_contains(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION))) { + const char *z; + + z = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION); + pa_proplist_setf(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Uplink Sink %s on %s", sink_data.name, z ? z : master->name); + } + + u->sink_memblockq = pa_memblockq_new("module-virtual-source sink_memblockq", 0, MEMBLOCKQ_MAXLENGTH, 0, &ss, 1, 1, 0, NULL); + if (!u->sink_memblockq) { + pa_sink_new_data_done(&sink_data); + pa_log("Failed to create sink memblockq."); + goto fail; + } + + u->sink = pa_sink_new(m->core, &sink_data, 0); /* FIXME, sink has no capabilities */ + pa_sink_new_data_done(&sink_data); + + if (!u->sink) { + pa_log("Failed to create sink."); + goto fail; + } + + u->sink->parent.process_msg = sink_process_msg_cb; + u->sink->update_requested_latency = sink_update_requested_latency_cb; + u->sink->set_state_in_main_thread = sink_set_state_in_main_thread_cb; + u->sink->userdata = u; + + pa_sink_set_asyncmsgq(u->sink, master->asyncmsgq); + pa_sink_set_rtpoll(u->sink, u->rtpoll); + + /* FIXME: no idea what I am doing here */ + u->block_usec = BLOCK_USEC; + nbytes = pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec); + pa_sink_set_max_rewind(u->sink, 0); + pa_sink_set_max_request(u->sink, nbytes); + + pa_sink_put(u->sink); + } else { + pa_sink_new_data_done(&sink_data); + /* optional uplink sink not enabled */ + u->sink = NULL; + } + + pa_modargs_free(ma); + + return 0; + +fail: + if (ma) + pa_modargs_free(ma); + + pa__done(m); + + return -1; +} + +int pa__get_n_used(pa_module *m) { + struct userdata *u; + + pa_assert(m); + pa_assert_se(u = m->userdata); + + return pa_source_linked_by(u->source); +} + +void pa__done(pa_module*m) { + struct userdata *u; + + pa_assert(m); + + if (!(u = m->userdata)) + return; + + /* See comments in source_output_kill_cb() above regarding + * destruction order! */ + + if (u->source_output) + pa_source_output_cork(u->source_output, true); + + if (u->source) + pa_source_unlink(u->source); + + if (u->source_output) { + pa_source_output_unlink(u->source_output); + pa_source_output_unref(u->source_output); + } + + if (u->source) + pa_source_unref(u->source); + + if (u->sink) { + pa_sink_unlink(u->sink); + pa_sink_unref(u->sink); + } + + if (u->memblockq) + pa_memblockq_free(u->memblockq); + + if (u->sink_memblockq) + pa_memblockq_free(u->sink_memblockq); + + if (u->rtpoll) + pa_rtpoll_free(u->rtpoll); + + pa_xfree(u); +} |